WARNING: This page is about a different car, the 2002 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Climate Control Panel (CCP)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Dash Integration Module (DIM)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Head Up Display (HUD) Scan Tool Output Controls